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High CMRR Instrumentation Amplifier (Schematic and Layout) design for biomedical applications

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Instrumentation amplifiers are intended to be used whenever acquisition of a useful signal is difficult. IA’s must have extremely high input impedances because source impedances may be high and/or unbalanced. bias and offset currents are low and relatively stable so that the source impedance need not be constant. Balanced differential inputs are provided so that the signal source may be referenced to any reasonable level independent of the IA output load reference. Common mode rejection, a measure of input balance, is very high so that noise pickup and ground drops, characteristic of remote sensor applications, are minimized.Care is taken to provide high, well characterized stability of critical parameters under varying conditions, such as changing temperatures and supply voltages. Finally, all components that are critical to the performance of the IA are internal to the device. The precision of an IA is provided at the expense of flexibility. By committing to the one specific task of ...
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Smartfish Mouse Pad Travel Pouch

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All mice these days no longer feature a trackball, relying on an optical sensor instead. Unfortunately, the optical sensor’s limitations are there, as it will not work across all surfaces, especially glass. That’s when you need an impromptu mouse pad, which makes the Smartfish Mouse Pad Travel Pouch a real genius as a practical traveling companion.
This mouse pad features a smooth 9� diameter surface work area for you to mouse around with, and once you’re done with your work, you can always slip the mouse inside, zip it up, and it doubles up as a protective pouch instead.
The nclusion of padded neoprene ensures your accessories (and mouse, of course) inside remains safe and sound when tucked away, and you can also opt to hang it from your backpack or suitcase for easy accessibility via the snap handle. At just $14.95 a pop, the Smartfish Mouse Pad Travel Pouch will come in blue and black shades from early next month onwards.

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